001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.codegen.intrinsics;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.asm4.Type;
022    import org.jetbrains.asm4.commons.InstructionAdapter;
023    import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
024    import org.jetbrains.jet.codegen.ExpressionCodegen;
025    import org.jetbrains.jet.codegen.StackValue;
026    import org.jetbrains.jet.codegen.state.GenerationState;
027    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
028    import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
029    import org.jetbrains.jet.lang.psi.JetCallExpression;
030    import org.jetbrains.jet.lang.psi.JetExpression;
031    import org.jetbrains.jet.lang.psi.JetSimpleNameExpression;
032    import org.jetbrains.jet.lang.resolve.BindingContext;
033    import org.jetbrains.jet.lang.resolve.java.JvmPrimitiveType;
034    import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
035    import org.jetbrains.jet.lang.types.lang.PrimitiveType;
036    
037    import java.util.List;
038    
039    public class ArrayIterator implements IntrinsicMethod {
040        @Override
041        public StackValue generate(
042                ExpressionCodegen codegen,
043                InstructionAdapter v,
044                @NotNull Type expectedType,
045                PsiElement element,
046                List<JetExpression> arguments,
047                StackValue receiver,
048                @NotNull GenerationState state
049        ) {
050            receiver.put(receiver.type, v);
051            JetCallExpression call = (JetCallExpression) element;
052            FunctionDescriptor funDescriptor = (FunctionDescriptor) codegen.getBindingContext()
053                    .get(BindingContext.REFERENCE_TARGET, (JetSimpleNameExpression) call.getCalleeExpression());
054            assert funDescriptor != null;
055            ClassDescriptor containingDeclaration = (ClassDescriptor) funDescriptor.getContainingDeclaration().getOriginal();
056            if (containingDeclaration.equals(KotlinBuiltIns.getInstance().getArray())) {
057                v.invokestatic("jet/runtime/ArrayIterator", "iterator", "([Ljava/lang/Object;)Ljava/util/Iterator;");
058                return StackValue.onStack(AsmTypeConstants.JET_ITERATOR_TYPE);
059            }
060            else {
061                for (JvmPrimitiveType jvmPrimitiveType : JvmPrimitiveType.values()) {
062                    PrimitiveType primitiveType = jvmPrimitiveType.getPrimitiveType();
063                    ClassDescriptor arrayClass = KotlinBuiltIns.getInstance().getPrimitiveArrayClassDescriptor(primitiveType);
064                    if (containingDeclaration.equals(arrayClass)) {
065                        String methodSignature = "([" + jvmPrimitiveType.getJvmLetter() + ")" + jvmPrimitiveType.getIterator().getDescriptor();
066                        v.invokestatic("jet/runtime/ArrayIterator", "iterator", methodSignature);
067                        return StackValue.onStack(jvmPrimitiveType.getIterator().getAsmType());
068                    }
069                }
070                throw new UnsupportedOperationException(containingDeclaration.toString());
071            }
072        }
073    }